EP1327744A1 - Rolloeinrichtung mit Zentrifugalbremse - Google Patents

Rolloeinrichtung mit Zentrifugalbremse Download PDF

Info

Publication number
EP1327744A1
EP1327744A1 EP02007830A EP02007830A EP1327744A1 EP 1327744 A1 EP1327744 A1 EP 1327744A1 EP 02007830 A EP02007830 A EP 02007830A EP 02007830 A EP02007830 A EP 02007830A EP 1327744 A1 EP1327744 A1 EP 1327744A1
Authority
EP
European Patent Office
Prior art keywords
overgear
aforesaid
torque
roller
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02007830A
Other languages
English (en)
French (fr)
Other versions
EP1327744B1 (de
Inventor
Pietro Zanusso
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mottura SpA
Original Assignee
Mottura SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mottura SpA filed Critical Mottura SpA
Publication of EP1327744A1 publication Critical patent/EP1327744A1/de
Application granted granted Critical
Publication of EP1327744B1 publication Critical patent/EP1327744B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/60—Spring drums operated only by closure members
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B2009/807—Brakes preventing fast screen movement

Definitions

  • the present invention relates to a roller blind device according to the preamble of Claim 1.
  • a roller blind device comprises a stationary supporting shaft, a roller onto which the blind is designed to be wound and which is mounted in such a way that it can turn about the stationary supporting shaft, and a return spring which tends to cause the roller to rotate in the direction of winding of the blind.
  • the roller loads the spring with elastic energy, which is used during the re-winding stage in order to cause the roller to rotate automatically in the direction of winding of the blind onto the roller itself.
  • the elastic return element generally consists of a helical spring set coaxially between the roller and the supporting shaft. At each complete revolution of the roller about its own axis there corresponds a turn of winding of the helical spring.
  • the pre-loading of the spring necessary for guaranteeing complete re-winding of the blind onto the roller in every condition may be in the region of 8-15 complete turns of the spring.
  • centrifugal brakes of roller blind devices are subject to a high risk of failure, in particular in the cases where the installer of the blind imparts an excessive pre-load on the roller-return spring, or else selects an excessively rigid spring as compared to the weight of the blind.
  • the centrifugal brake before the centrifugal brake is able to enter into action for slowing down rising of the roller, the static torque which is exerted upon the roller at the moment of disengagement of the blind produces a very high stress on the components of the centrifugal brake.
  • the purpose of the present invention is to provide an improved roller blind device that will overcome the aforesaid drawback.
  • the above purpose is achieved by a device having the characteristics that form the subject of the main claim.
  • number 10 designates a roller blind device comprising a pair of supports 12 which carry a stationary supporting shaft 14, around which a roller 16 is mounted so that it can turn, a blind 18 being wound on the roller 16.
  • the roller blind device 10 comprises a return spring set coaxially between the stationary supporting shaft 14 and the roller 16, as well as an arrest device designed to withhold the roller against the action or return of the spring in a generic lowered position of the roller blind 18 chosen by the user.
  • the structure and function of the spring return device and of the arrest device are not described in detail in so far as they do not fall within the scope of the present application and are well known to a person skilled in the sector.
  • the roller blind device 10 comprises a centrifugal brake, designated as a whole by 20.
  • the centrifugal brake 20 comprises a cylindrical body 22 inserted inside the roller 16 and fixed in rotation to the latter.
  • the centrifugal brake 20 comprises an annular element 24 which is fixed with respect to the body 22 and has an internal cylindrical braking surface 26.
  • Two or more centrifugal weights 28 are mounted so that they can turn inside the surface 26 and are set in such a way that, by the centrifugal effect, they are pressed against the surface 26, thus providing a braking contact.
  • the centrifugal weights 28 are provided with brake pads 30.
  • the annular element 24 is made as a component separate from the body 22 in so far as it is preferably made of a material having higher characteristics of wear resistance as compared to the material forming the body 22.
  • the body 22 may be made of a plastic material, whereas the annular element 24 may be made of brass.
  • the annular element 24 could be eliminated, and in this case the centrifugal weights 28 would co-operate with a braking surface formed integrally with the body 22.
  • the annular element 24 is housed in a cover 32 fixed to the body 22 by means of screws 34.
  • the centrifugal weights 28 are mounted in an oscillating way about respective pins 36 carried by a disk-shaped element 38 that constitutes the output member of an overgear device of a planetary-gear type, designated as a whole by 40.
  • the overgear device 40 comprises a supporting element 42 which carries, in such a way that they can rotate freely, a plurality of planetary gears 44 which mesh with an internal toothing 46 of the body 22.
  • the planetary gears 44 moreover mesh with a ring gear 48 which is fixed with respect to the element 38 that carries the centrifugal weights 28.
  • the overgear mechanism 40 is represented in a simplified way, with a single speed-increasing stage of a planetary-gear type. In order to augment the speed-increasing ratio, the overgear mechanism 40 could be provided with two or more speed-increasing stages of planetary-gear type cascaded together.
  • the supporting element 42 of the overgear device 40 co-operates with a unidirectional-transmission device 48, which comprises a helical spring 50 set coaxially outside a cylindrical portion 52 of the supporting element 42.
  • a tubular sleeve 54 has a cylindrical seat 56 which surrounds the helical spring 50 externally.
  • One end 58 of the spring 50 is inserted inside a slit 60 of the sleeve 54.
  • the purpose of the unidirectional-actuation device 48 is to prevent the centrifugal brake from going into action when the roller 16 rotates in the direction for lowering of the blind.
  • the roller blind device moreover comprises a torque-limiting device 58 which has the purpose of limiting the torque transmitted to the centrifugal brake 20.
  • the torque-limiting device 58 comprises a stationary member 60 fixed to one end of the stationary supporting shaft 16.
  • the stationary member 60 has a square-section hole 62, which engages, in such a way that it cannot turn, the stationary supporting shaft 14, which also has a square cross section.
  • an omega-shaped retention clip 64 may be provided for retention in the axial direction of the stationary member 60 on the shaft 14.
  • the stationary member 60 of the torque-limiting device 58 comprises a plurality of arms 66 which are elastically deformable in the radial direction.
  • the stationary member 60 consists of a monolithic body made of injection-moulded plastic material, and the arms 66 extend in cantilever fashion in the tangential direction.
  • a free space 68 is provided in a position corresponding to each arm 66 in order to enable the arm to deform elastically in a radial direction inwards.
  • the elastically deformable arms 66 of the stationary member 60 co-operate with an internal toothing 70 formed on an internal cylindrical surface of the sleeve 54.
  • the arms 66 have substantially hook-shaped ends 72 that form seats, within which respective pins 74 that co-operate with the toothing 70 are housed.
  • the radial elasticity of the arms 66 and the degree of interference between the arms 66 and the toothing 70 are determined in such a way as to obtain a pre-set torque for entry into action of the device 58.
  • the torque that tends to cause the sleeve 54 to rotate with respect to the stationary member 60 is lower than the pre-set torque level, the sleeve 54 remains fixed to the stationary sleeve 60.
  • the sleeve 54 receives a torque about its own axis that exceeds the value of the torque for entry into action of the torque-limiting device 58, the sleeve 54 rotates about its own axis with respect to the stationary member 60.
  • the torque-limiting device 58 operates like a sliding-friction clutch which dissipates a certain amount of energy, performing a braking action which opposes the torque that tends to cause the sleeve 54 to rotate with respect to the stationary member 60.
  • the sleeve 54 is free to rotate about its own axis with respect to the body 22 and is withheld axially with respect to the body 22 by a cover 72 fixed to the body 22.
  • the roller 16 rotates under the action of return of the spring (not illustrated) in a second direction, namely in the direction of winding of the blind onto the roller.
  • the body 22 imparts a rotation on the planetary gears 44 in the second direction.
  • the planetary gears 44 tend to cause the supporting element 42 to rotate in the second direction.
  • the unidirectional-transmission device 48 goes into action and blocks the supporting element 42 with respect to the sleeve 54.
  • the supporting element 42 is thus stationary.
  • the overgear device 40 performs an increase of the speed of rotation of the output member 38 with respect to the speed of rotation of the body 22.
  • the centrifugal weights 28 are then driven in rotation by the output member 38 and move outwards against the internal surface 26 of the annular element 24, thus performing a braking action.
  • the reaction torque necessary for keeping the supporting element 41 in a stationary position passes through the torque-limiting device 58. If the said torque exceeds the limit for entry into action of the torque-limiting device 58, the sleeve 54 rotates in the second direction, producing a dissipation of energy as a result of the relative movement of the toothing 70 with respect to the elastically deformable teeth 66. If the sleeve 54 rotates in the second direction, the overgear 40 is idle and does not perform any speed increase.
  • the torque-limiting device 58 could be implemented in different ways, without prejudice to the fact of providing a device which keeps an element fixed to the shaft 14 if the torque that acts on the said element is lower than a pre-set limit and which enables freedom of movement of said element when the torque acting thereon exceeds the pre-set limit value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Braking Arrangements (AREA)
  • Blinds (AREA)
EP02007830A 2001-12-18 2002-04-08 Rolloeinrichtung mit Zentrifugalbremse Expired - Lifetime EP1327744B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001TO001186A ITTO20011186A1 (it) 2001-12-18 2001-12-18 ,,dispositivo di tenda a rullo con freno centrifugo,,.
ITTO011186 2001-12-18

Publications (2)

Publication Number Publication Date
EP1327744A1 true EP1327744A1 (de) 2003-07-16
EP1327744B1 EP1327744B1 (de) 2003-07-23

Family

ID=11459342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007830A Expired - Lifetime EP1327744B1 (de) 2001-12-18 2002-04-08 Rolloeinrichtung mit Zentrifugalbremse

Country Status (5)

Country Link
EP (1) EP1327744B1 (de)
AT (1) ATE245759T1 (de)
DE (1) DE60200011T2 (de)
ES (1) ES2203607T3 (de)
IT (1) ITTO20011186A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251523A3 (de) * 2009-03-30 2010-12-15 Coretronic (Suzhou) Co.,Ltd. Mécanisme d'entraînement
CN102454732A (zh) * 2010-10-20 2012-05-16 大常窗户系统有限公司 旋转辊的卷绕速度减速装置
US10337243B2 (en) 2017-04-10 2019-07-02 Mechoshade Systems, Llc Geared bracket for a window shade
CN110043180A (zh) * 2019-05-15 2019-07-23 宁波王门家居用品有限公司 扭力预载装置、扭力预载卷帘和扭力预载方法
WO2020139082A1 (en) * 2018-12-24 2020-07-02 Vako B.V. Operating mechanism for a window covering and window covering
US10900280B2 (en) 2017-09-20 2021-01-26 Hunter Douglas Inc. Architectural structure covering having a speed regulating assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005014173B4 (de) * 2005-03-29 2010-11-11 Webasto Ag Rolloanordnung, insbesondere Laderaumabdeckung für den Laderaum eines Fahrzeugs, mit Endlagendämpfung
CN101865281B (zh) * 2009-04-14 2013-02-13 爱心科技有限责任公司 传动机构
DE102013221419B4 (de) 2013-10-09 2024-03-28 Michael Müller Sicht-/Sonnen- oder Fliegenschutz und Fliehkraftbremse mit Freilauf für einen Sicht-/Sonnen- oder Fliegenschutz

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513805A (en) * 1982-04-30 1985-04-30 Toso Kabushiki Kaisha Decelerator for use in roller blinds

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513805A (en) * 1982-04-30 1985-04-30 Toso Kabushiki Kaisha Decelerator for use in roller blinds

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251523A3 (de) * 2009-03-30 2010-12-15 Coretronic (Suzhou) Co.,Ltd. Mécanisme d'entraînement
US8357066B2 (en) 2009-03-30 2013-01-22 Aixin Technologies, Llc Drive mechanism
CN102454732A (zh) * 2010-10-20 2012-05-16 大常窗户系统有限公司 旋转辊的卷绕速度减速装置
CN102454732B (zh) * 2010-10-20 2014-09-10 大常窗户系统有限公司 旋转辊的卷绕速度减速装置
US10337243B2 (en) 2017-04-10 2019-07-02 Mechoshade Systems, Llc Geared bracket for a window shade
US10808457B2 (en) 2017-04-10 2020-10-20 Mechoshade Systems, Llc Planetary gear with bead stop
US11230885B2 (en) 2017-04-10 2022-01-25 Mechoshade Systems, Llc Geared window shade bracket with bead stop
US10900280B2 (en) 2017-09-20 2021-01-26 Hunter Douglas Inc. Architectural structure covering having a speed regulating assembly
WO2020139082A1 (en) * 2018-12-24 2020-07-02 Vako B.V. Operating mechanism for a window covering and window covering
NL2022305B1 (nl) * 2018-12-24 2020-07-23 Vako B V Bedieningsmechanisme voor een raambekleding en raambekleding
CN110043180A (zh) * 2019-05-15 2019-07-23 宁波王门家居用品有限公司 扭力预载装置、扭力预载卷帘和扭力预载方法
CN110043180B (zh) * 2019-05-15 2023-09-29 贝芬(宁波)家居科技有限公司 扭力预载装置、扭力预载卷帘和扭力预载方法

Also Published As

Publication number Publication date
EP1327744B1 (de) 2003-07-23
ITTO20011186A0 (it) 2001-12-18
ITTO20011186A1 (it) 2003-06-18
DE60200011D1 (de) 2003-08-28
DE60200011T2 (de) 2004-04-22
ES2203607T3 (es) 2004-04-16
ATE245759T1 (de) 2003-08-15

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